首页> 外文期刊>The Astrophysical journal >PULSATING SPECTRUM OF SUBDWARF STAR PG 1605+072: COMPARATIVE TIME-FREQUENCY ANALYSIS VIA WAVELET PACKET AND LOCAL SINE PACKET TRANSFORMS OF AN INTERRUPTED LIGHT CURVE
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PULSATING SPECTRUM OF SUBDWARF STAR PG 1605+072: COMPARATIVE TIME-FREQUENCY ANALYSIS VIA WAVELET PACKET AND LOCAL SINE PACKET TRANSFORMS OF AN INTERRUPTED LIGHT CURVE

机译:SUBWARFSTAR PG 1605 + 072的脉动谱:通过插值光曲线的小波包和局部正弦包变换进行比较时频分析

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摘要

We present the time-frequency analysis of an interrupted light-curve time series of the pulsating subdwarf B (sdB) star PG 1605+072. From the data of a eight-night observational run we have determined the pulsating spectrum of PG 1605+072. We used both wavelet packet transform (WPTs) and localized sine packet transform (LSPTs) analysis to compare frequency determinations with previous results based on Fourier methods and their typical modeling of signals by strictly harmonic contributions. The procedures adopted here allow the determination of the pulsating spectrum of the combined night runs of data with a reduction of the usual alias peaks produced by the daytime observing gaps, thus providing a clean and compact spectrum. We also use various compression techniques to study signal reconstruction under WPT.
机译:我们提出了脉动亚矮B(sdB)星PG 1605 + 072的间断光曲线时间序列的时频分析。根据八晚观测运行的数据,我们确定了PG 1605 + 072的脉动谱。我们同时使用了小波包变换(WPT)和局部正弦包变换(LSPT)分析,将频率确定与基于傅立叶方法的先前结果及其通过严格谐波贡献的典型信号建模进行了比较。此处采用的程序可以确定组合数据夜间运行的脉动频谱,同时减少白天观测间隙产生的常见混叠峰,从而提供干净紧凑的频谱。我们还使用各种压缩技术来研究WPT下的信号重建。

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